Simulation of creep crack growth in ceramic composites

摘要: The elevated temperature response resulting from tensile creep of fiber reinforced ceramic composites was modeled using Monte Carlo simulation. model consisted a uniaxially loaded tow aligned with the direction applied load, and growth matrix cracks failure bridging fibers. A strain rate consisting primary steady state components assumed, each component by power law relationship. Power exponents in range 2.0–2.5 for selected SiC/SiC system at stress levels ranging 60 MPa to 200 were evaluated. Fatigue-like behavior predicted as result creep, fatigue exponent 3.03 ± 0.07 nominal less than GPa. influence initial crack length on lifetime also studied, but found have little lifetime. suggested dependent process could be used experimental data evaluate mechanism composites.